497 results match your criteria: "Oxford Heart Centre[Affiliation]"

Prognostic Value of Microvascular Resistance Reserve After Percutaneous Coronary Intervention in Patients With Myocardial Infarction.

J Am Coll Cardiol

May 2024

Department of Cardiology, Catharina Hospital, Eindhoven, the Netherlands; Department of Cardiology, St Antonius Hospital, Nieuwegein, the Netherlands. Electronic address:

Article Synopsis
  • The microvascular resistance reserve (MRR) is a new index developed to evaluate the vasodilatory capacity of the microcirculation, particularly relevant for patients with ST-segment elevation myocardial infarction (STEMI), whose prognostic value was previously unknown.
  • This study analyzed data from 1,265 STEMI patients, focusing on a subgroup where both MRR and index of microcirculatory resistance (IMR) were available, to compare their effectiveness in predicting long-term outcomes.
  • The findings revealed that MRR is a significant predictor of long-term all-cause mortality or heart failure hospitalization, with a cutoff value of 1.25 indicating higher risk when below this level.
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The 2023 European Bifurcation Club (EBC) meeting took place in Warsaw in October, and the latest evidence for the use of intravascular ultrasound (IVUS) and optical coherence tomography (OCT) to optimise percutaneous coronary interventions (PCI) on coronary bifurcation lesions (CBLs) was a major focus. The topic generated deep discussions and general appraisal on the potential benefits of IVUS and OCT in PCI procedures. Nevertheless, despite an increasing recognition of IVUS and OCT capabilities and their recognised central role for guidance in complex CBL and left main PCI, it is expected that angiography will continue to be the primary guidance modality for CBL PCI, principally due to educational and economic barriers.

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Aims: The trials upon which recommendations for the use of cardiac resynchronization therapy (CRT) in heart failure used optimal medical therapy (OMT) before sodium-glucose co-transporter 2 inhibitors (SGLT2i). Moreover, the SGLT2i heart failure trials included only a small proportion of participants with CRT, and therefore, it remains uncertain whether SGLT2i should be considered part of OMT prior to CRT.

Methods And Results: We compared electrocardiogram (ECG) and echocardiographic responses to CRT as well as hospitalization and mortality rates in consecutive patients undergoing implantation at a large tertiary centre between January 2019 to June 2022 with and without SGLT2i treatment.

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Background: Primary percutaneous coronary intervention (pPCI) has improved clinical outcomes in patients with ST-segment-elevation myocardial infarction. However, as many as 50% of patients still have suboptimal myocardial reperfusion and experience extensive myocardial necrosis. The PiCSO-AMI-I trial (Pressure-Controlled Intermittent Coronary Sinus Occlusion-Acute Myocardial Infarction-I) evaluated whether PiCSO therapy can further reduce myocardial infarct size (IS) in patients undergoing pPCI.

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Background: Prolonged preoperative fasting may worsen postoperative outcomes. Cardiac surgery has higher perioperative risk, and longer fasting periods may be not well-tolerated. We analysed the postoperative metabolic and hemodynamic variables in patients undergoing elective coronary artery bypass grafting (CABG) according to their morning or afternoon schedule.

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Aims: To conduct a meta-analysis of randomized controlled trials (RCTs) to assess the effect of sodium-glucose cotransporter-2 (SGLT2) inhibitors on inflammatory biomarkers.

Methods: Medline, Embase and the Cochrane Library were searched for RCTs investigating the effect of SGLT2 inhibitors on inflammatory biomarkers, adipokine profiles and insulin sensitivity.

Results: Thirty-eight RCTs were included (14 967 participants, 63.

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Background: Iron Deficiency (ID) is common in Heart Failure (HF) and associated with poor outcomes. Replacement with intravenous (IV) iron can improve functional status, quality of life and risk of unplanned admission. In 2015/16 a local service evaluation was performed which found that of people admitted with HF, only 27.

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Background: Patients with ST-segment-elevation myocardial infarction but no coronary microvascular injury are at low risk of early cardiovascular complications (ECC). We aim to assess whether nonhyperemic angiography-derived index of microcirculatory resistance (NH-IMR) could be a user-friendly tool to identify patients at low risk of ECC, potentially candidates for expedited care pathway and early hospital discharge.

Methods: Retrospective analysis of 2 independent, international, prospective, observational cohorts included 568 patients with ST-segment-elevation myocardial infarction.

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Self-monitoring blood pressure in Pregnancy: Evaluation of health professional experiences of the BUMP trials.

Pregnancy Hypertens

March 2024

Nuffield Department of Primary Care Health Sciences, University of Oxford, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, UK. Electronic address:

Background: The BUMP trials evaluated a self-monitoring of blood pressure intervention in addition to usual care, testing whether they improved detection or control of hypertension for women at risk of hypertension or with hypertension during pregnancy. This process evaluation aimed to understand healthcare professionals' perspectives and experiences of the BUMP trials of self-monitoring of blood pressure during pregnancy.

Methods: Twenty-two in-depth qualitative interviews and an online survey with 328 healthcare professionals providing care for pregnant people in the BUMP trials were carried out across five maternity units in England.

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Article Synopsis
  • Over the past few decades, bioprosthetic heart valves have become more common than mechanical valves in surgical aortic valve replacements, but structural valve deterioration is a frequent issue that may require further intervention.
  • * The innovation of valve-in-valve transcatheter aortic valve replacement (ViV TAVR) has emerged as a practical solution for patients with failed bioprosthetic valves, especially those at high surgical risk.
  • * This review highlights the importance of multidisciplinary planning, current clinical evidence, procedural techniques, and potential complications to optimize ViV TAVR outcomes for both surgical and transcatheter heart valve failures.
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Recently, both US and European guidelines have predominantly recommended coronary artery bypass grafting (CABG) as the preferred revascularisation method. However, emerging data have raised the possibility of percutaneous coronary intervention (PCI) being a viable and effective alternative. This meta-analysis sought to evaluate the latest insights from major clinical trials to ascertain whether PCI could be as effective as CABG in treating left main coronary artery (LMCA) disease.

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Bolus or Continuous Thermodilution: Which Is the Right Approach to Convert Assessment of CMD Into an "Atomic Habit"?

JACC Cardiovasc Interv

November 2023

Oxford Heart Centre, Oxford University Hospitals, National Health Service Trust, Oxford, United Kingdom; Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom; National Institute for Health Research Oxford Biomedical Research Centre, Oxford, United Kingdom.

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Stratification of acute myocardial and endothelial cell injury, salvage index and final infarct size by systematic microRNA profiling in acute ST-elevation myocardial infarction.

Coron Artery Dis

March 2024

Division of Cardiovascular Medicine, British Heart Foundation Centre of Research Excellence, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK.

Aim: Acute injury and subsequent remodelling responses to ST-segment elevation myocardial infarction (STEMI) are major determinants of clinical outcome. Current imaging and plasma biomarkers provide delayed readouts of myocardial injury and recovery. Here, we sought to systematically characterize all microRNAs (miRs) released during the acute phase of STEMI and relate miR release to magnetic resonance imaging (MRI) findings to predict acute and late responses to STEMI, from a single early blood sample.

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Despite prompt epicardial recanalization in patients presenting with ST-segment elevation myocardial infarction (STEMI), coronary microvascular obstruction and dysfunction (CMVO) is still fairly common and is associated with poor prognosis. Various pharmacological and mechanical strategies to treat CMVO have been proposed, but the positive results reported in preclinical and small proof-of-concept studies have not translated into benefits in large clinical trials conducted in the modern treatment setting of patients with STEMI. Therefore, the optimal management of these patients remains a topic of debate.

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Non-invasive left ventricular pressure-volume loops from cardiovascular magnetic resonance imaging and brachial blood pressure: validation using pressure catheter measurements.

Eur Heart J Imaging Methods Pract

September 2023

Department of Cardiovascular Medicine, John Radcliffe Hospital, Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford OX3 9DU, United Kingdom.

Aims: Left ventricular (LV) pressure-volume (PV) loops provide gold-standard physiological information but require invasive measurements of ventricular intracavity pressure, limiting clinical and research applications. A non-invasive method for the computation of PV loops from magnetic resonance imaging and brachial cuff blood pressure has recently been proposed. Here we evaluated the fidelity of the non-invasive PV algorithm against invasive LV pressures in humans.

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Percutaneous coronary intervention (PCI) is widely adopted to treat chronic coronary artery disease. Numerous randomised trials have been conducted to test whether PCI may provide any prognostic advantage over oral medical therapy (OMT) alone, without definitive results. This has maintained the paradigm of OMT as the first-line standard of care for patients, reserving PCI for symptom control.

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Cardiac resynchronization using fusion pacing during exercise.

J Cardiovasc Electrophysiol

January 2024

Department of Physiology, Anatomy and Genetics, Burdon Sanderson Cardiac Science Centre, University of Oxford, Oxford, UK.

Introduction: Fusion pacing requires correct timing of left ventricular pacing to right ventricular activation, although it is unclear whether this is maintained when atrioventricular (AV) conduction changes during exercise. We used cardiopulmonary exercise testing (CPET) to compare cardiac resynchronization therapy (CRT) using fusion pacing or fixed AV delays (AVD).

Methods: Patients 6 months post-CRT implant with PR intervals < 250 ms performed two CPET tests, using either the SyncAV™ algorithm or fixed AVD of 120 ms in a double-blinded, randomized, crossover study.

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Objectives: To ascertain whether invasive assessment of coronary physiology soon after recanalisation of the culprit artery by primary percutaneous coronary intervention is associated with the development of microvascular obstruction by cardiac magnetic resonance in patients with ST-segment elevation myocardial infarction (STEMI).

Methods: Between November 2020 and December 2021, 102 consecutive patients were prospectively enrolled in five tertiary centres in Italy. Coronary flow reserve (CFR) and index of microvascular resistance (IMR) were measured in the culprit vessel soon after successful primary percutaneous coronary intervention.

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Aims: The fragmentation and loss of elastic fibre in the tunica media of the aorta are pathological hallmarks of Marfan syndrome (MFS) but the dynamics of elastin degradation and its relationship to aortic size and physiological growth remain poorly understood.

Methods And Results: In this analysis of the AIMS randomized controlled trial, the association of plasma desmosine (pDES)-a specific biomarker of mature elastin degradation-with age and aortic size was analysed in 113 patients with MFS and compared to 109 healthy controls. There was a strong association between age and pDES in both groups, with higher pDES levels in the lower age groups compared to adults.

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The Index of Microcirculatory Resistance After Primary PCI: A Pooled Analysis of Individual Patient Data.

JACC Cardiovasc Interv

October 2023

Division of Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, Stanford, California, USA; Veterans Affairs Palo Alto Healthcare System, Palo Alto, California, USA. Electronic address:

Article Synopsis
  • Despite primary PCI treatment for STEMI, patients still face high risks of heart failure and late death due to microvascular dysfunction, measured by IMR.
  • The study aims to determine if IMR is an independent predictor of cardiac death, identify the optimal cutoff value of IMR, and compare it to other cardiac parameters.
  • Results from 1,265 patients show that a higher IMR (especially >40) is associated with increased cardiac mortality and hospitalization for heart failure, establishing an optimal cutoff value of 70 for predicting cardiac death.
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Introduction: COVID-19 infection can precede, in a proportion of patients, a prolonged syndrome including fatigue, exercise intolerance, mood and cognitive problems. This study aimed to describe the profile of fatigue-related, exercise-related, mood-related and cognitive-related outcomes in a COVID-19-exposed group compared with controls.

Methods: 113 serving UK Armed Forces participants were followed up at 5, 12 (n=88) and 18 months (n=70) following COVID-19.

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Chest pain affects more than 100 million people globally, however up to 70% of patients undergoing invasive angiography do not have obstructive coronary artery disease and ischemia with non-obstructive coronary artery disease (INOCA) is often a cause of the clinical picture. The symptoms reported by INOCA patients are very heterogeneous and often misdiagnosed as non-cardiac leading to under-diagnosis/investigation and under-treatment. The underlying pathophysiological mechanisms of INOCA are multiple and include coronary vasospasm and microvascular dysfunction.

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